CN112602840A

CN112602840A - Feed for pregnant sows and preparation method and application thereof

Info

Publication number: CN112602840A
Application number: CN202011468104.7A
Authority: CN
Inventors: 陈建华; 苏海燕; 余群莲; 唐圣果; 王萌硕; 熊世鸿; 杨玉容; 任红
Original assignee: Chongqing Nongtou Meat Food Co ltd
Current assignee: Chongqing Nongtou Meat Food Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-06

Abstract

The invention provides a feed for pregnant sows and a preparation method and application thereof. The feed comprises the following raw materials in parts by weight: 45-56 parts of corn, 2-9 parts of wheat middling, 8-17 parts of wheat bran, 10-21 parts of soybean hull, 6-17 parts of soybean meal, 0.4-1.5 parts of soybean oil and 2-7 parts of core material. The preparation method comprises the following steps: performing first crushing on corn and soybean meal in parts by mass; and performing secondary crushing on the corn and the bean pulp after the primary crushing, the corn, the wheat middling, the wheat bran, the soybean hull, the bean pulp, the soybean oil and the core material, uniformly mixing, and granulating to obtain the feed for the pregnant sows. The feed disclosed by the invention contains proper crude fiber, mineral substances, vitamins and the like, and can be used for preventing constipation of sows, improving the number of piglets, the number of live piglets and the number of healthy piglets, and increasing the birth weight of piglets; the preparation method has high production efficiency and high yield.

Description

Feed for pregnant sows and preparation method and application thereof

Technical Field

The invention relates to the technical field of pig feed, in particular to feed for pregnant sows and a preparation method and application thereof.

Background

Pregnant sows, are sows from the start of mating to the end of delivery. For the feed management of pregnant sows, ensuring that fetuses develop normally, preventing the sows from abortion, improving the delivery rate, ensuring litter size, piglet birth weight and litter size, and keeping the normal body conditions of the sows are important tasks of feeding management.

At present, additives such as feed antibiotics and the like are often added into feed to achieve the effect of promoting production, but the long-term use of the feed antibiotics and the like in the feed can cause drug resistance of pathogenic bacteria, organism residue and environmental pollution, thereby threatening the health of human beings and pigs. In addition, in order to increase the breeding quantity and reduce the feed input of many farmers in China, a sow is raised by adopting a limit fence, the activity space of the sow is small, the exercise amount is small, the fetus is increased continuously to press the intestinal tract, the gastrointestinal peristalsis is slow, and the immunity of the sow is reduced due to reasons of term feeding during pregnancy, insufficient nutrition intake and the like, so that the health of the sow faces serious threats, and a series of serious problems such as the reduction of the service life of the sow due to the low birth quantity of piglets, the low initial weight, the poor postpartum recovery of the sow and the like are caused. Therefore, in order to solve the problems, a feed with reasonable component matching is needed to solve the problems of low birth weight, low initial weight and low live number of piglets.

Disclosure of Invention

In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, an object of the present invention is to provide a feed for pregnant sows, which solves the problems of low birth weight, low initial weight and low number of live piglets.

The invention provides a feed for pregnant sows, which comprises the following raw materials in parts by weight: 45-56 parts of corn, 2-9 parts of wheat middling, 8-17 parts of wheat bran, 10-21 parts of soybean hull, 6-17 parts of soybean meal, 0.4-1.5 parts of soybean oil and 2-7 parts of core material, wherein the core material comprises the following raw materials in parts by weight: 24-36 parts of mountain flour, 20-31 parts of calcium hydrophosphate, 0.9-2 parts of pig multivitamin, 0.15-0.35 part of phytase, 0.4-1 part of a complex enzyme preparation, 0.3-0.8 part of a flavoring agent, 0.95-1.45 part of a mildew preventive, 0.25-0.8 part of an antioxidant, 2.5-8 parts of choline chloride, 3.5-7 parts of pig polymineral, 0.25-0.95 part of nano selenium, 0.1-0.35 part of chromium pyridine, 0.95-1.65 part of an amino acid zinc complex, 0.9-1.65 part of ferrous glycinate, 7-16 parts of salt, 2.5-12.5 parts of baking soda, 2.5-8 parts of potassium chloride, 0.25-1.15 part of arginine biotin, 1.8-3.2 parts of a mildew remover and 0.1-0.5 part of vitamin E.

In another aspect of the present invention, there is provided a method for preparing a feed for pregnant sows, which may comprise the steps of: firstly crushing corn and soybean meal in parts by weight; and secondly, crushing the corn and the bean pulp after the first crushing, the corn, the wheat middling, the wheat bran, the soybean hull, the bean pulp, the soybean oil and the core material, uniformly mixing, and granulating to obtain the feed for the pregnant sows.

In a further aspect, the invention provides the use of a feed for pregnant sows, comprising feeding between 2kg and 4kg per day.

Compared with the prior art, the beneficial effects of the invention at least comprise at least one of the following:

(1) the feed disclosed by the invention is reasonable in components and proportion, and can provide sufficient energy and nutrition for pregnant sows;

(2) the feed disclosed by the invention contains proper crude fiber, mineral substances, vitamins and the like, and can be used for preventing constipation of sows, improving the number of piglets, the number of live piglets and the number of healthy piglets, and increasing the birth weight of piglets;

(3) the preparation method of the invention can improve the palatability and the absorption rate of the feed, and has high production efficiency and high yield.

Detailed Description

Hereinafter, the feed for pregnant sows according to the present invention, and the preparation method and application thereof will be described in detail with reference to exemplary embodiments.

The invention provides a feed for pregnant sows. In an exemplary embodiment of the feed for pregnant sows of the present invention, the feed may comprise the following raw materials in parts by weight: 45-56 parts of corn, 2-9 parts of wheat middling, 8-17 parts of wheat bran, 10-21 parts of soybean hull, 6-17 parts of soybean meal, 0.4-1.5 parts of soybean oil and 2-7 parts of core material. Wherein, the core material can comprise the following raw materials in parts by weight:

24-36 parts of mountain flour, 20-31 parts of calcium hydrophosphate, 0.9-2 parts of pig multivitamin, 0.15-0.35 part of phytase, 0.4-1 part of a complex enzyme preparation, 0.3-0.8 part of a flavoring agent, 0.95-1.45 part of a mildew preventive, 0.25-0.8 part of an antioxidant, 2.5-8 parts of choline chloride, 3.5-7 parts of pig polymineral, 0.25-0.95 part of nano selenium, 0.1-0.35 part of chromium pyridine, 0.95-1.65 part of an amino acid zinc complex, 0.9-1.65 part of ferrous glycinate, 7-16 parts of salt, 2.5-12.5 parts of baking soda, 2.5-8 parts of potassium chloride, 0.25-1.15 part of arginine biotin, 1.8-3.2 parts of a mildew remover and 0.1-0.5 part of vitamin E.

The main component of the feed is corn, the corn in the mass portion can provide sufficient energy for pregnant sows, and the corn with the component has moderate crude fiber content and is easy to digest for the pregnant sows. However, because the corn has low protein content, the bean pulp is a good protein feed. By adding the soybean meal and the corn in parts by mass for mutual matching, the sufficient energy provided by the feed can be ensured, and meanwhile, the sufficient protein is ensured. Further, the soybean meal may be 43% soybean meal.

The protein content of the wheat middling is 14% -15%, the digestion of pigs is similar to that of corn, the amino acid content is 2-3 times of that of corn, a large amount of trace elements and vitamins are contained, the wheat middling is convenient to purchase, and the price is low. Because the amino acid balance of the corn is poor, the content of the necessary amino acid is low, so the wheat middling in parts by mass needs to be added to be matched with the corn for use.

The wheat bran has high content of crude protein and high content of lysine, tryptophan and threonine, and can provide enough protein and amino acids for pregnant sow and provide large amount of energy for pregnant sow. However, the wheat bran content is not too high, and the pregnant sow is easy to have indigestion due to the wheat bran content. The wheat bran content is too low, so that the content of crude protein and amino acid in the feed is easily insufficient, and the wheat bran content is set as the wheat bran content of the invention.

The soybean hull has higher content of coarse feed and less content of lignin, the palatability is better than that of straw crops, and the soybean hull with 10-15 percent of the feed amount of the sow is added, so that the constipation of the sow can be effectively prevented and treated, the body health of the sow is enhanced, the lactation capacity is enhanced, and the production performance of the pregnant sow is improved.

The soybean oil is rich in linoleic acid which is essential fatty acid required by the sow, can provide energy for the pregnant sow and can improve the vitality of the pregnant sow. The soybean oil in parts by mass is added into the feed for the pregnant sows, and the corn in parts by mass is matched, so that the insulin secretion amount and activity can be inhibited and reduced, the progesterone level and activity are improved, the fur quality of the sows is improved, the birth weight and activity of piglets are improved, and the constipation degree of the pregnant sows, particularly in the later period, is improved.

In the core material, the mountain flour is a calcium supplement for pregnant sows, and the main component of the stone flour is calcium carbonate. The calcium hydrogen phosphate mainly provides mineral substance nutrition such as phosphorus, calcium and the like for the livestock and poultry compound feed, can enhance the disease resistance and cold resistance of pregnant sows, and has the effect of preventing and treating constipation of the pregnant sows.

The added pig multivitamins can enhance the resistance of pregnant sows, and the pig multivitamins in parts by mass can supplement multivitamins in the pregnancy period, so that the physical ability of sows is enhanced, and the growth and development of fetal pigs are promoted. Further, the swine multi-vitamin may be DSM 456.

The phytase can improve the utilization rate of phosphorus in the feed, improve the production performance of animals and reduce the probability of feed pollution. Further, the phytase may be high temperature resistant phytase 10000.

The complex enzyme preparation can be composed of xylanase, cellulase, beta-glucanase and the like generated by microbial fermentation. The compound enzyme preparation can reduce the viscosity of the small intestine chyme, influence the activity of endogenous digestive enzyme and the nutrient distribution of digestive tract tissues, promote the digestion and absorption of nutrient substances, improve the utilization rate of feed, reduce the discharge of animal pollutants and reduce the pollution to the environment. Further, the compound enzyme preparation can be an A-F811S compound enzyme preparation. Of course, the compound enzyme preparation can also be other commonly used compound enzyme preparations for feed.

Further, the flavoring agent may be natural extract, ethyl maltol, vanillin, etc. The flavoring agent can improve piglet ingestion and growth speed.

Further, the mildew preventive may be benzoic acid.

Further, the antioxidant is ethoxyquinoline.

Further, the choline chloride may be 50% choline chloride. For example, choline chloride 50 produced by Cangzhou eastern veterinary drug Co.

Further, the nano-selenium may be a selenium loving, which may be a selenium loving content of 0.05% to 0.15%, for example 0.1%.

Further, the pig multiore can comprise the following raw materials in parts by weight: 20-31 parts of ferrous sulfate, 1.6-2.5 parts of basic copper chloride, 3-12 parts of manganese sulfate, 2.5-8 parts of zinc oxide, 3-8 parts of calcium iodate, 1.3-2.6 parts of sodium selenite and 48-59 parts of zeolite powder. The boar multiore prepared from the raw materials according to the weight part ratio can participate in the metabolic process of enzyme and vitamin in the feed, can assist in conveying macro elements, and can be used as a component or an activator of the enzyme. The pig multiore can also comprise other mineral elements such as potassium iodide and the like. Furthermore, the pig multiore can be prepared from the following raw materials in parts by weight: 20-31 parts of ferrous sulfate, 1.6-2.5 parts of basic copper chloride, 3-12 parts of manganese sulfate, 2.5-8 parts of zinc oxide, 3-8 parts of calcium iodate, 1.3-2.6 parts of sodium selenite and 48-59 parts of zeolite powder. For example, the pig multiore can comprise the following raw materials in parts by weight: 28 parts of ferrous sulfate, 2.1 parts of basic copper chloride, 8 parts of manganese sulfate, 5 parts of zinc oxide, 4.8 parts of calcium iodate, 2.2 parts of sodium selenite and 53 parts of zeolite powder. In the composition of the pig multiore, the ferrous sulfate can be 30% ferrous sulfate, the basic copper chloride can be 58% basic copper chloride, the manganese sulfate can be 31.8% manganese sulfate, the zinc oxide can be 75% zinc oxide, the calcium iodate can be calcium iodate with iodine content of 1%, and the sodium selenite can be sodium selenite with selenium content of 1%.

Further, the chromium pyridine may be feed grade chromium pyridine, and the chromium content in the feed grade chromium pyridine may be 1.2% to 2.0%, for example, 1.6%.

Further, the zinc amino acid complex may be zinc aminovalet.

Further, the argininol may be argininol (NCG 90%).

Further, the feed for the pregnant sows can be prepared from the following raw materials in parts by weight: 45-56 parts of corn, 2-9 parts of wheat middling, 8-17 parts of wheat bran, 10-21 parts of soybean hull, 6-17 parts of soybean meal, 0.4-1.5 parts of soybean oil and 2-7 parts of core material. Wherein, the core material can be composed of the following raw materials in parts by weight: 24-36 parts of mountain flour, 20-31 parts of calcium hydrophosphate, 0.9-2 parts of pig multivitamin, 0.15-0.35 part of phytase, 0.4-1 part of a complex enzyme preparation, 0.3-0.8 part of a flavoring agent, 0.95-1.45 part of a mildew preventive, 0.25-0.8 part of an antioxidant, 2.5-8 parts of choline chloride, 3.5-7 parts of pig polymineral, 0.25-0.95 part of nano selenium, 0.1-0.35 part of chromium pyridine, 0.95-1.65 part of an amino acid zinc complex, 0.9-1.65 part of ferrous glycinate, 7-16 parts of salt, 2.5-12.5 parts of baking soda, 2.5-8 parts of potassium chloride, 0.25-1.15 part of arginine biotin, 1.8-3.2 parts of a mildew remover and 0.1-0.5 part of vitamin E.

Further, the feed for the pregnant sows consists of the following raw materials in parts by weight: 53 parts of corn, 4 parts of wheat middling, 12 parts of wheat bran, 17 parts of soybean hull, 11 parts of soybean meal, 1.2 parts of soybean oil and 5 parts of core material. The core material comprises the following raw materials in parts by weight: 27 parts of stone powder, 27 parts of calcium hydrophosphate, 1.2 parts of pig multivitamin, 0.3 part of phytase, 0.7 part of complex enzyme preparation, 0.6 part of flavoring agent, 1.2 parts of mildew preventive, 0.5 part of antioxidant, 4.7 parts of choline chloride, 5 parts of pig multiore, 0.6 part of nano-selenium, 0.2 part of chromium pyridine, 1.3 parts of amino acid zinc complex, 1.25 parts of ferrous glycinate, 11 parts of salt, 8 parts of baking soda, 5 parts of potassium chloride, 0.8 part of arginine biotin, 2.5 parts of mildew remover and 0.3 part of vitamin E. The boar multi-mineral comprises the following raw materials in parts by weight: 28 parts of ferrous sulfate, 2.1 parts of basic copper chloride, 8 parts of manganese sulfate, 5 parts of zinc oxide, 4.8 parts of calcium iodate, 2.2 parts of sodium selenite and 53 parts of zeolite powder. The raw material proportion of the components is the optimal proportion, the nutrition proportion is excellent, the energy requirement of the pregnant sow can be completely met, the development of a fetus can be promoted, the crude fiber content is appropriate, and the constipation of the pregnant sow can be further prevented.

Furthermore, the volume weight of the corn can be more than 710g/L, the impurity can be less than 1%, the vomitoxin can be less than 1000ppb, the gibberellin toxin can be less than 100ppb, and the aflatoxin can be less than 20 ppb. For example, the volume weight of corn may be 760g/L or more, the impurities may be 0.5%, the vomitoxin may be 800ppb, the zearalenone toxin may be 86ppb, and the aflatoxin may be 16 ppb.

The invention also provides a preparation method of the feed for the pregnant sows, which can prepare the feed for the pregnant sows in parts by mass. In an exemplary embodiment of the inventive method for preparing a feed for pregnant sows, the method comprises the steps of:

step 1, performing first crushing on corn and soybean meal in parts by mass.

And 2, performing second crushing on the corn and the soybean meal subjected to the first crushing, the corn, the wheat middling, the wheat bran, the soybean hull, the soybean meal, the soybean oil and the core material, uniformly mixing, and granulating to obtain the feed for the pregnant sows.

Further, the first pulverization in the step 1 can adopt 2.0-3.0 MM sieve piece pulverization.

Furthermore, the temperature required during granulation is 70-80 ℃, the aperture of the granulating ring die is 2.8-3.0MM, and the compression ratio is 1: 5-7, for example, the compression ratio is 1: 6.

Further, the hardness of the prepared feed particles is 2.0-3.5 cattle; the powder content is less than 5 percent.

In a further aspect of the invention, the application of the feed for pregnant sows is provided, and the feed is fed by 2 kg-4 kg per day. Preferably, the feed may be increased gradually with the feeding process, for example, 2kg per day for the first month, 3kg per day for the second month, 4kg per day after the third month, and 4kg thereafter.

In order that the above-described exemplary embodiments of the invention may be better understood, further description thereof with reference to specific examples is provided below.

Examples 1 to 3 feeds of 500kg were prepared from the raw materials in the parts by mass shown in table 1.

TABLE 1 examples of formulation composition units/kg

	Example 1	Example 2	Example 3
				Corn (corn)	257	297	225
Wheat middling	19	19	32
				Wheat bran	58	52	64
Soybean coat	83	71	81
				Bean pulp	53	39	64
Soybean oil	6	3	6
				Core material	24	19	28

In example 1, the core material comprises the following raw materials in parts by weight: 27 parts of stone powder, 27 parts of calcium hydrophosphate, 1.2 parts of pig multivitamin, 0.3 part of phytase, 0.7 part of complex enzyme preparation, 0.6 part of flavoring agent, 1.2 parts of mildew preventive, 0.5 part of antioxidant, 4.7 parts of choline chloride, 5 parts of pig multiore, 0.6 part of nano-selenium, 0.2 part of chromium pyridine, 1.3 parts of amino acid zinc complex, 1.25 parts of ferrous glycinate, 11 parts of salt, 8 parts of baking soda, 5 parts of potassium chloride, 0.8 part of arginine biotin, 2.5 parts of mildew remover and 0.3 part of vitamin E. 100kg of the core material is prepared according to the raw material composition ratio by mass, and then 24kg of the core material is weighed and added as the core material in example 1. In the core material, the pig multiore comprises 28 parts by weight of ferrous sulfate, 2.1 parts by weight of basic copper chloride, 8 parts by weight of manganese sulfate, 5 parts by weight of zinc oxide, 4.8 parts by weight of calcium iodate, 2.2 parts by weight of sodium selenite and 53 parts by weight of zeolite powder. 100kg of the multi-ore pig feed is prepared according to the mixture ratio of the multi-ore pig feed, and then 1.21kg of the multi-ore pig feed is weighed and added into the core feed.

In example 2, the core material comprises the following raw materials in parts by weight: 24 parts of stone powder, 21 parts of calcium hydrophosphate, 0.9 part of swine vitamins, 0.2 part of phytase, 0.5 part of complex enzyme preparation, 0.3 part of flavoring agent, 1.0 part of mildew preventive, 0.25 part of antioxidant, 3.0 parts of choline chloride, 3.5 parts of swine polymineral, 0.3 part of nano-selenium, 0.2 part of chromium pyridine, 1.1 parts of amino acid zinc complex, 1.1 parts of ferrous glycinate, 8 parts of salt, 3.0 parts of baking soda, 2.5 parts of potassium chloride, 0.3 part of arginine biotin, 1.8 parts of mildew remover and 0.2 part of vitamin E. 100kg of the core material was prepared according to the above raw material composition ratio by mass, and 19kg of the core material was weighed and added as in example 2. In the core material, the pig multiore comprises 21 parts by weight of ferrous sulfate, 1.8 parts by weight of basic copper chloride, 4 parts by weight of manganese sulfate, 2.5 parts by weight of zinc oxide, 5 parts by weight of calcium iodate, 2.1 parts by weight of sodium selenite and 49 parts by weight of zeolite powder. 100kg of the multi-mineral pig feed is prepared according to the mixture ratio of the multi-mineral pig feed, and then 0.91kg of the multi-mineral pig feed is weighed and added into the core material.

In example 3, the core material comprises the following raw materials in parts by weight: 35 parts of stone powder, 30 parts of calcium hydrophosphate, 1.8 parts of swine multivitamin, 0.32 part of phytase, 1 part of complex enzyme preparation, 0.7 part of flavoring agent, 1.4 parts of mildew preventive, 0.7 part of antioxidant, 7 parts of choline chloride, 6.5 parts of swine polymineral, 0.9 part of nano selenium, 0.3 part of chromium pyridine, 1.6 parts of amino acid zinc complex, 1.6 parts of ferrous glycinate, 15 parts of salt, 12 parts of baking soda, 7 parts of potassium chloride, 1.1 parts of arginine biotin, 3 parts of mildew remover and 0.5 part of vitamin E. 100kg of the core material was prepared according to the above raw material composition ratio by mass, and then 28kg of the core material was weighed and added as in example 3. In the core material, the boar polymineral comprises 30 parts by weight of ferrous sulfate, 2.4 parts by weight of basic copper chloride, 11 parts by weight of manganese sulfate, 7 parts by weight of zinc oxide, 7 parts by weight of calcium iodate, 2.6 parts by weight of sodium selenite and 58 parts by weight of zeolite powder. 100kg of the multi-ore pig feed is prepared according to the mixture ratio of the multi-ore pig feed, and then 0.78kg of the multi-ore pig feed is weighed and added into the core material.

Comparative example 1

A feed for pregnant sows purchased on the market.

Comparative example 2

In contrast to example 1, no core material was added.

Comparative example 3

Compared with example 1, the core material was 1 part, i.e., 4.8kg, and the others were the same.

Comparative example 4

Compared with example 1, the number of the boars is 1.5, and the rest is the same.

Comparative example 5

Compared with example 1, the number of the boars is 11, and the rest are the same.

Comparative example 6

Compared with example 1, the mass part ratio of corn to soybean oil was 20: 1.

180 pregnant pigs with similar weight and gestational age are selected, the test pigs are divided into 9 groups, and 20 pigs in each group are fed with the feed of examples 1-3 and comparative examples 1-6. The feeding management of the sow is carried out according to the conventional requirements of a pig farm, wherein the piglet is subjected to group internal fostering after birth and is not subjected to group cross fostering. The test pigs are fed in different meals in the morning and afternoon, the uneaten feed is taken out and weighed one hour after feeding, and the feed intake of the sows is calculated. The trial began 10 days after sow mating and was performed for a total of 135 days.

TABLE 1 comparison of data for each example and comparative example

The sow constipation judgment standard is that the sow dries hard spherical feces, and if the sow constipation judgment standard is that the sow constipation is 'constipation'; if not, the record is "inconvenient secret". The constipation rate is constipation frequency/(number of sows × number of test days) × 100%.

As can be seen from table 1 above, example 1 has a certain increase in average litter size, average live litter size, average healthy litter size, and litter size compared to examples 2 and 3, and example 1 may be a preferred group allocation ratio.

Examples 1 to 3 show that the average litter size, average live litter size, average healthy litter size, and litter weight were all increased to some extent and the weak litter size was decreased to some extent as compared with comparative example 1, and that the number of litter and the survival of litter were improved and the weight of piglets born was promoted by using the feed for sows of the present invention. In addition, by using the feed of the present invention, the constipation rate of sows is significantly reduced.

Comparing example 1 with comparative example 2 and comparative example 3, the effect of the feed of the present invention was not sufficiently exerted by the absence of the core feed and by the addition of too little core feed, and the effects of comparative example 2 and comparative example 3 were reduced in litter size, number of live piglets, number of healthy piglets, and birth weight of piglets.

Comparing example 1 with comparative examples 4-5, the farrowing of the pregnant sows was affected by the addition of too much more minerals and too little. The pig is rich in minerals and has too low content, for example, the insufficient content of manganese element can cause the reduction of the number of piglets; too much selenium, for example, may cause abnormal embryo development and increase weak piglet occupancy. Therefore, the boar polymineral needs to be added within the scope of the present invention to prevent shortage or excess.

The corn and the soybean oil are matched with each other, so that the secretion and the activity of insulin can be inhibited and reduced, the level and the activity of progesterone are improved, and the birth weight of piglets is improved. Comparing example 1 and comparative example 6, the weight of the piglets in comparative example 6 was significantly reduced compared to example 1 due to the unreasonable ratio of corn and soybean oil.

Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The feed for the pregnant sows is characterized by comprising the following raw materials in parts by weight:

45-56 parts of corn, 2-9 parts of wheat middling, 8-17 parts of wheat bran, 10-21 parts of soybean hull, 6-17 parts of soybean meal, 0.4-1.5 parts of soybean oil and 2-7 parts of core material, wherein,

the core material comprises the following raw materials in parts by weight:

2. The feed for pregnant sows according to claim 1, wherein the breeding pigs contain the following raw materials in parts by weight:

20-31 parts of ferrous sulfate, 1.6-2.5 parts of basic copper chloride, 3-12 parts of manganese sulfate, 2.5-8 parts of zinc oxide, 3-8 parts of calcium iodate, 1.3-2.6 parts of sodium selenite and 48-59 parts of zeolite powder.

3. The feed for pregnant sows according to claim 1 or 2, comprising the following raw materials in parts by weight:

53 parts of corn, 4 parts of wheat middling, 12 parts of wheat bran, 17 parts of soybean hull, 11 parts of soybean meal, 1.2 parts of soybean oil and 5 parts of core material.

4. The feed for pregnant sows according to claim 3, wherein the core material comprises the following raw materials in parts by weight:

27 parts of stone powder, 27 parts of calcium hydrophosphate, 1.2 parts of pig multivitamin, 0.3 part of phytase, 0.7 part of complex enzyme preparation, 0.6 part of flavoring agent, 1.2 parts of mildew preventive, 0.5 part of antioxidant, 4.7 parts of choline chloride, 5 parts of pig multiore, 0.6 part of nano-selenium, 0.2 part of chromium pyridine, 1.3 parts of amino acid zinc complex, 1.25 parts of ferrous glycinate, 11 parts of salt, 8 parts of baking soda, 5 parts of potassium chloride, 0.8 part of arginine biotin, 2.5 parts of mildew remover and 0.3 part of vitamin E.

5. The feed for pregnant sows according to claim 1, 2 or 4, wherein the placer concentrate comprises 28 parts by weight of ferrous sulfate, 2.1 parts by weight of basic copper chloride, 8 parts by weight of manganese sulfate, 5 parts by weight of zinc oxide, 4.8 parts by weight of calcium iodate, 2.2 parts by weight of sodium selenite and 53 parts by weight of zeolite powder.

6. The feed for pregnant sows of claim 1, 2 or 4, wherein the bulk weight of corn is 710g/L or more, the impurities are 1% or less, the vomitoxin is less than 1000ppb, the gibberellin toxin is less than 100ppb, and the aflatoxin is less than 20 ppb.

7. The feed for pregnant sows as claimed in claim 1, 2 or 4, wherein the nano-selenium comprises 0.05-0.15% by mass of selenium and the chromium pyridine comprises 1.2-2.0% by mass of chromium.

8. A method for preparing a feed for pregnant sows as claimed in any one of claims 1 to 7, comprising the steps of:

performing first crushing on corn and soybean meal in parts by mass;

and performing secondary crushing on the corn and the bean pulp after the primary crushing, the corn, the wheat middling, the wheat bran, the soybean hull, the bean pulp, the soybean oil and the core material, uniformly mixing, and granulating to obtain the feed for the pregnant sows.

9. The preparation method of the feed for the pregnant sows according to claim 8, wherein the first pulverization is carried out by adopting 2.0-3.0 MM sieve sheet pulverization, the granulation temperature is 70-80 ℃, the aperture of a granulation circular mold is 2.8-3.0MM, and the compression ratio is 1: 5-7.

10. Use of the feed for pregnant sows according to any one of claims 1 to 7 or the feed for pregnant sows prepared by the process according to any one of claims 8 to 9 in feeding, wherein 2kg to 4kg is fed per day.